I raised mollies for years and years. That little fry is prob.not going to make it. there is at least one in every litter that wont make it. Here is what I did for my babies.

Gave mama a few days in the birthing tank. once I felt she was done I would place her back in the standard tank. feed mama. then i would take some flake food and place it in a ziplock bag and crush it very fine. once it was powdered i fed them a very small amount each day untill they made it to larger food. once they were to big for the other fish to eat I would let them in to the adult tank and get the birthing tank ready for the next litter.

it got to the point that i had to get a full blown birthing tank. (a small 5 gal tank with an UG filter) I also ended up buying a small can of flake food and grinding it all up. it was much cheaper that way then to buy pree ground food that was the same as the stuff I was making.